In 'extremely rare' attack, polar bear killed mother and child in Alaska. Now we know why.

The January incident was the first fatal polar bear attack since 1990. (Image credit: Shutterstock)

Last month, a polar bear killed a woman and her 1-year-old child in Alaska. It was the first fatal polar bear attack recorded in the U.S. in more than 30 years. Now, a new report sheds light on what may have caused the tragic event. 

Experts analyzed the animal's tissues, which revealed that the male bear was in poor physical shape and likely elderly. However, it's unknown exactly what triggered the polar bear's (Ursus maritimus) aggressive behavior. 

Summer Myomick, 24, and her infant son, Clyde Ongtowasruk, were mauled to death Jan. 17 in the coastal town of Wales, the westernmost city on the mainland of North America. The pair were leaving a school when a polar bear attacked them in the middle of the street: A heavy snowstorm at the time meant that Myomick did not see the bear coming until it was too late. School staff attempted to stop the bear by hitting it with shovels, but the bear turned on the staff and forced them to retreat back into the school, which was full of pupils at the time. The school remained in lockdown until a village resident arrived with a gun and shot the polar bear dead, AP News reported.

"Polar bear attacks on people are extremely rare," Lindsey Mangipane, a wildlife biologist with the U.S. Fish and Wildlife Service's Polar Bear Program in Alaska, told Live Science in an email. The last U.S. attack happened in 1993, and the last fatality occurred in 1990, in Point Lay, Alaska, she added. 

So what caused the rare attack?

Dr. Kimberlee Beckmen, a vet with the Alaska Department of Fish and Game's Division of Wildlife Conservation (DWC), conducted tests on tissue samples collected from the dead polar bear to learn more about why the animal behaved so aggressively. The results were released Feb. 3 in a statement by the DWC.

Related: Move over polar bears, there's another top predator along the Arctic coast

A sign in the Arctic island of Svalbard, Norway, warns locals of the risk of polar bears. (Image credit: Shutterstock)

At the time of the attack, there was speculation in the media that the bear may have had a brain-altering disease, such as rabies, toxoplasmosis, distemper or bird flu. "These conditions could impact bear behavior," Mangipane said, "but because we don't generally encounter affected bears in [the] wild, we are unsure how symptoms would impact the way bears interact with people."

However, the tests carried out by Beckmen came back negative for any brain-altering pathogens. Instead, the bear's sex and physical condition were likely to be the "key factors" that influenced the attack, Mangipane said.

The bear in the Wales attack was an adult male in "poor body condition" and was likely elderly, according to DWC. (A tooth was sent for a separate analysis to determine the bear's age, but the results haven't been released at the time of publication.)

In a 2017 study, published in the journal Wildlife Society Bulletin, researchers analyzed data from 73 polar bear attacks between 1870 and 2014 across Canada, Greenland, Norway, Russia and the U.S. and found that "nutritionally stressed adult male polar bears were the most likely to pose threats to human safety." This latest attack is consistent with these findings, Mangipane said.

There was "no definitive explanation as to why the bear was in poor body condition," DWC representatives wrote in the statement. But it is possible that human-caused climate change played a role. 

"Sea ice loss is resulting in polar bears having less access to their primary prey," such as seals, Mangipane said. "This means that polar bears may increasingly be in poor body condition, especially when encountered on land." 

Climate change could also be elevating the risk of attacks occurring in other places.

"Historically, polar bears spent most of their time on the sea ice which resulted in minimal spatial overlap with people," Mangipane said. "As the open-water season becomes longer [due to increased melting], some areas are experiencing more bears on land for longer periods of time, increasing the probability of human-bear interactions."

Harry Baker
Senior Staff Writer

Harry is a U.K.-based senior staff writer at Live Science. He studied marine biology at the University of Exeter before training to become a journalist. He covers a wide range of topics including space exploration, planetary science, space weather, climate change, animal behavior, evolution and paleontology. His feature on the upcoming solar maximum was shortlisted in the "top scoop" category at the National Council for the Training of Journalists (NCTJ) Awards for Excellence in 2023. 

  • Avtronic
    “Now we know why?” Hmmm…no we don’t.
  • ursussiara
    yeah and hows that pack ice again lately???
    and it happened during a whiteout blizzard.

    its so damn obvious somethings up with the "climate crises" .. every single story that has any natural element to it whatsoever, has the "due to climate change" phrase included or eluded to repeatedly.

    lets see starving adult male bear is looking for a snack during hibernation.. why isnt the bear still hibertnating? they are in the lower 48. the old guy prolly didnt get enough fat stored to carry him through our longer than usual winter this year.

    also wouldnt you think an age analysis would be an important part of any report going out. 2 weeks for a dental confirmation? a. the vet doing the autopsy had the entire rest of the bear to estimtate the age, incl stomach contents..

    then your gonna tell me that an "expert" in "polar bear age as determined by dentistry" or whatever that is..
    are you gonna tell me any of those experts wouldnt drop everything to analyze a tooth from an animal that just killed a mom and baby outside a school?? nvm that last i checked veternaries do dentistry too. or am i wrong?

    im gonna feel like a real idiot if this was an ai generated story.
    your gonna feal like an idiot if this is an ai comment.
  • ursussiara
    and yes you are correct, we still dont know why
  • Delta1
    Why the POLITICAL agenda? There is no REAL proof of man-made warming. Just cherry picked data and even outright conspiracy / falsification, like the University of East Anglia.
    There has been proof, for at least a few years, of global cooling, but of course, that does not fit the Globalist narrative / agenda so it is not covered.
  • SALitz67
    Delta1 said:
    Why the POLITICAL agenda? There is no REAL proof of man-made warming. Just cherry picked data and even outright conspiracy / falsification, like the University of East Anglia.
    There has been proof, for at least a few years, of global cooling, but of course, that does not fit the Globalist narrative / agenda so it is not covered.
    You are 100% correct! Since the dawn of time the earth has heated and cooled. Waters have risen and fallen. We know this to be fact due to all the landmarks being uncovered by the falling waters and the sudden rise of volcanoes, like the one about to erupt in Iceland!
    But if the government doesn't push this agenda, they can't force us to purchase stupid ideas like GREEN NEW DEAL, electric cars and ban ovens, ceiling fans and other conveniences.
    I pray more people wake up and realize, the Newport Beach Pier, in California and the famous pier in New York are not anymore in the water than they were when they were originally built! Wake up people!